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A Maciolek

Publications and source records attributed to A Maciolek.

4 recordsLinked to original sources
PubMed2001

Crossover between ordinary and normal transitions in the presence of a bulk field.

We investigate two-dimensional Ising films at the critical temperature T(c) and nonzero bulk magnetic field h using the density-matrix renormalization-group method. The crossover between ordinary (h(1)=0) and normal (h(1)=infinity) transitions corresponding to finite values of the surface fields h(1)=h(2), is studied. The structure and the solvation force f(solv) as a function of h, crucially depend on the value of h(1). Scaling functions for f(solv) and the longitudinal correlation length are given and discussed.

Journal Article↗
PubMed2000

Effect of bulk magnetic field on critical Ising films

Two-dimensional Ising films L x infinity in a nonvanishing bulk magnetic field H are studied at the bulk critical temperature Tc for two choices of surface fields (a) H1 = HL = 0 (ordinary transition), and (b) H1 = HL = infinity (normal transition) by the density-matrix renormalization-group method. Universal scaling functions for magnetization profiles, the excess magnetization gamma, the longitudinal correlation length xi parallel, and for the analog of the solvation force fsolv are found and discussed. When H1 = 0 the scaling function for fsolv has two symmetric minima at y = sgn(H)L magnitude of H nu/delta approximately +/- 1 with an amplitude at the minimum about 3.8 times the value at H = 0, the Casimir amplitude. For the normal transition the scaling function for fsolv has a single minimum near the continuation of the pseudocoexistence (capillary condensation) line, with an amplitude about 100 times the Casimir amplitude.

Journal Article↗